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Investment Securities (Tables)

6 Months Ended

Jun. 30, 2024

Investments, Debt and Equity Securities [Abstract]

Schedule of available-for-sale securities reconciliation

The following table presents amortized cost, gross unrealized gains and losses, and fair values of securities available-for-sale as of the dates indicated:

			June 30, 2024
									Allowance												Gross						Gross
			Amortized						for Credit						Net Carrying						Unrealized						Unrealized						Fair
Security Type			Cost						Losses						Amount						Gains						Losses						Value
			(In thousands)
Agency residential MBS			$	1,333,993					$	—					$	1,333,993					$	—					$	(232,132)					$	1,101,861
Agency commercial MBS			257,920						—						257,920						—						(16,577)						241,343
Agency residential CMOs			313,088						—						313,088						—						(34,828)						278,260
Municipal securities			34,541						—						34,541						—						(1,484)						33,057
Corporate debt securities			327,471						(199)						327,272						1,436						(46,746)						281,962
Private label residential CMOs			187,716						—						187,716						—						(37,430)						150,286
Collateralized loan obligations			109,168						—						109,168						272						(86)						109,354
Private label commercial MBS			19,144						—						19,144						—						(1,068)						18,076
Asset-backed securities			17,472						—						17,472						—						(28)						17,444
SBA securities			13,388						—						13,388						—						(1,000)						12,388
Total			$	2,613,901					$	(199)					$	2,613,702					$	1,708					$	(371,379)					$	2,244,031

			December 31, 2023
									Allowance												Gross						Gross
			Amortized						for Credit						Net Carrying						Unrealized						Unrealized						Fair
Security Type			Cost						Losses						Amount						Gains						Losses						Value
			(In thousands)
Agency residential MBS			$	1,388,801					$	—					$	1,388,801					$	—					$	(201,192)					$	1,187,609
U.S. Treasury securities			4,965						—						4,965						3						—						4,968
Agency commercial MBS			268,639						—						268,639						—						(15,333)						253,306
Agency residential CMOs			320,984						—						320,984						—						(36,650)						284,334
Municipal securities			29,192						—						29,192						—						(1,109)						28,083
Corporate debt securities			327,426						(199)						327,227						259						(60,254)						267,232
Private label residential CMOs			193,071						—						193,071						—						(34,659)						158,412
Collateralized loan obligations			109,168						—						109,168						—						(752)						108,416
Private label commercial MBS			22,126						—						22,126						—						(1,313)						20,813
Asset-backed securities			20,241						—						20,241						—						(289)						19,952
SBA securities			14,642						—						14,642						—						(903)						13,739
Total			$	2,699,255					$	(199)					$	2,699,056					$	262					$	(352,454)					$	2,346,864

Schedule of realized gains and losses on securities available-for-sale

The were no investment securities sales for the three and six months ended June 30, 2024 and 2023.

Unrealized losses on investment securities available-for-sale

The following tables present the gross unrealized losses and fair values of securities available-for-sale that were in unrealized loss positions as of the dates indicated:

			June 30, 2024
			Less Than 12 Months												12 Months or More												Total
									Gross												Gross												Gross
			Fair						Unrealized						Fair						Unrealized						Fair						Unrealized
Security Type			Value						Losses						Value						Losses						Value						Losses
			(In thousands)
Agency residential MBS			$	—					$	—					$	1,101,862					$	(232,132)					$	1,101,862					$	(232,132)
Agency commercial MBS			—						—						241,343						(16,577)						241,343						(16,577)
Agency residential CMOs			—						—						278,260						(34,828)						278,260						(34,828)
Municipal securities			—						—						33,057						(1,484)						33,057						(1,484)
Corporate debt securities			—						—						278,895						(46,746)						278,895						(46,746)
Private label residential CMOs			—						—						150,286						(37,430)						150,286						(37,430)
Collateralized loan obligations			20,852						(86)						—						—						20,852						(86)
Private label commercial MBS			—						—						18,076						(1,068)						18,076						(1,068)
Asset-backed securities			17,445						(28)						—						—						17,445						(28)
SBA securities			—						—						12,388						(1,000)						12,388						(1,000)
Total			$	38,297					$	(114)					$	2,114,167					$	(371,265)					$	2,152,464					$	(371,379)

			December 31, 2023
			Less Than 12 Months												12 Months or More												Total
									Gross												Gross												Gross
			Fair						Unrealized						Fair						Unrealized						Fair						Unrealized
Security Type			Value						Losses						Value						Losses						Value						Losses
			(In thousands)
Agency residential MBS			$	—					$	—					$	1,187,609					$	(201,192)					$	1,187,609					$	(201,192)
Agency commercial MBS			—						—						253,306						(15,333)						253,306						(15,333)
Agency residential CMOs			—						—						265,431						(36,650)						265,431						(36,650)
Municipal securities			—						—						284,334						(1,109)						284,334						(1,109)
Corporate debt securities			—						—						19,952						(60,254)						19,952						(60,254)
Private label residential CMOs			—						—						158,412						(34,659)						158,412						(34,659)
Collateralized loan obligations			—						—						66,886						(752)						66,886						(752)
Private label commercial MBS			—						—						28,083						(1,313)						28,083						(1,313)
Asset-backed securities			—						—						20,813						(289)						20,813						(289)
SBA securities			—						—						13,739						(903)						13,739						(903)
Total			$	—					$	—					$	2,298,565					$	(352,454)					$	2,298,565					$	(352,454)

Schedule of held-to-maturity securities reconciliation

The following table presents amortized cost, allowance for credit losses, gross unrealized gains and losses, and fair values of securities held-to-maturity as of the date indicated:

			June 30, 2024
									Allowance
									for						Net						Gross						Gross
			Amortized						Credit						Carrying						Unrealized						Unrealized						Fair
Security Type			Cost						Losses						Amount						Gains						Losses						Value
			(In thousands)
Municipal securities			$	1,249,421					$	(140)					$	1,249,281					$	46					$	(51,317)					$	1,198,010
Agency commercial MBS			437,110						—						437,110						—						(36,391)						400,719
Private label commercial MBS			352,880						—						352,880						—						(30,053)						322,827
U.S. Treasury securities			188,495						—						188,495						—						(16,566)						171,929
Corporate debt securities			70,302						(1,360)						68,942						—						(16,498)						52,444
Total (1)			$	2,298,208					$	(1,500)					$	2,296,708					$	46					$	(150,825)					$	2,145,929

__________________________

(1)    Excludes accrued interest receivable of $13.4 million at June 30, 2024 which is recorded in "Other assets" on the condensed consolidated balance sheets.

			December 31, 2023
									Allowance
									for						Net						Gross						Gross
			Amortized						Credit						Carrying						Unrealized						Unrealized						Fair
Security Type			Cost						Losses						Amount						Gains						Losses						Value
			(In thousands)
Municipal securities			$	1,247,310					$	(140)					$	1,247,170					$	1,760					$	(28,170)					$	1,220,760
Agency commercial MBS			433,827						—						433,827						—						(30,665)						403,162
Private label commercial MBS			350,493						—						350,493						—						(29,289)						321,204
U.S. Treasury securities			187,033						—						187,033						—						(11,454)						175,579
Corporate debt securities			70,128						(1,360)						68,768						—						(21,157)						47,611
Total (1)			$	2,288,791					$	(1,500)					$	2,287,291					$	1,760					$	(120,735)					$	2,168,316

__________________________

(1)    Excludes accrued interest receivable of $13.4 million at December 31, 2023 which is recorded in "Other assets" on the condensed consolidated balance sheets.

Debt Securities, Held-to-maturity, Allowance for Credit Loss

The following table presents the changes by major security type in our allowance for credit losses on securities held-to-maturity for the periods indicated:

			Allowance for						Provision																		Allowance for
			Credit Losses,						for																		Credit Losses,
			Beginning						Credit																		End of
Security Type			of Period						Losses						Charge-offs						Recoveries						Period
			(In thousands)
Three Months Ended June 30, 2024
Municipal securities			$	140					$	—					$	—					$	—					$	140
Corporate debt securities			1,360						—						—						—						1,360
Total			$	1,500					$	—					$	—					$	—					$	1,500
Six Months Ended June 30, 2024
Municipal securities			$	140					$	—					$	—					$	—					$	140
Corporate debt securities			1,360						—						—						—						1,360
Total			$	1,500					$	—					$	—					$	—					$	1,500

			Allowance for						Provision																		Allowance for
			Credit Losses,						for																		Credit Losses,
			Beginning						Credit																		End of
Security Type			of Period						Losses						Charge-offs						Recoveries						Period
			(In thousands)
Three Months Ended June 30, 2023
Municipal securities			$	140					$	—					$	—					$	—					$	140
Corporate debt securities			1,360						—						—						—						1,360
Total			$	1,500					$	—					$	—					$	—					$	1,500
Six Months Ended June 30, 2023
Municipal securities			$	140					$	—					$	—					$	—					$	140
Corporate debt securities			1,360						—						—						—						1,360
Total			$	1,500					$	—					$	—					$	—					$	1,500

Debt Securities, Held-to-maturity, Credit Quality Indicator

The following table presents our securities held-to-maturity portfolio at amortized cost by the lowest available credit rating as of the dates indicated:

			June 30, 2024
Security Type			AAA						AA+						AA						AA-						A+						A						A-						BBB						NR						Total
			(In thousands)
Amortized Cost:
Municipal securities			$	564,410					$	399,743					$	193,049					$	60,722					$	11,996					$	1,779					$	—					$	—					$	17,722					$	1,249,421
Agency commercial
MBS			—						437,110						—						—						—						—						—						—						—						437,110
Private label
commercial MBS			352,880						—						—						—						—						—						—						—						—						352,880
U.S. Treasury
securities			—						188,495						—						—						—						—						—						—						—						188,495
Corporate debt
securities			—						—						—						—						—						—						—						44,438						25,864						70,302
Total			$	917,290					$	1,025,348					$	193,049					$	60,722					$	11,996					$	1,779					$	—					$	44,438					$	43,586					$	2,298,208

			December 31, 2023
Security Type			AAA						AA+						AA						AA-						A+						A						A-						BBB						NR						Total
			(In thousands)
Amortized Cost:
Municipal securities			$	564,127					$	397,542					$	167,905					$	86,243					$	12,007					$	1,787					$	—					$	—					$	17,699					$	1,247,310
Agency commercial
MBS			—						433,827						—						—						—						—						—						—						—						433,827
Private label
commercial MBS			350,493						—						—						—						—						—						—						—						—						350,493
U.S. Treasury
securities			—						187,033						—						—						—						—						—						—						—						187,033
Corporate debt
securities			—						—						—						—						—						—						—						44,371						25,757						70,128
Total			$	914,620					$	1,018,402					$	167,905					$	86,243					$	12,007					$	1,787					$	—					$	44,371					$	43,456					$	2,288,791

Investment income

The following table presents the composition of our interest income on investment securities, including available-for-sale and held-to-maturity, for the periods indicated:

			Three Months Ended												Six Months Ended
			June 30,												June 30,
			2024						2023						2024						2023
			(In thousands)
Taxable interest			$	27,064					$	38,207					$	54,665					$	76,899
Non-taxable interest			4,746						4,922						9,466						9,825
Dividend income			2,026						1,024						4,008						1,666
Total interest income on investment securities			$	33,836					$	44,153					$	68,139					$	88,390

Available-for-sale Investments Classified by Contractual Maturity Date

The following tables present the contractual maturities of our securities available-for-sale portfolio based on amortized cost and fair value as of the date indicated:

			June 30, 2024
									Due After						Due After
			Due						One Year						Five Years						Due
			Within						Through						Through						After
Security Type			One Year						Five Years						Ten Years						Ten Years						Total
			(In thousands)
Amortized Cost:
Agency residential MBS			$	—					$	—					$	707					$	1,333,286					$	1,333,993
Agency commercial MBS			—						234,514						6,129						17,277						257,920
Agency residential CMOs			—						51,213						—						261,875						313,088
Municipal securities			—						16,876						17,665						—						34,541
Corporate debt securities			—						5,000						322,471						—						327,471
Private label residential CMOs			—						—						—						187,716						187,716
Collateralized loan obligations			—						—						109,168						—						109,168
Private label commercial MBS			—						—						1,170						17,974						19,144
Asset-backed securities			—						—						—						17,472						17,472
SBA securities			—						2,430						4,180						6,778						13,388
Total			$	—					$	310,033					$	461,490					$	1,842,378					$	2,613,901

			June 30, 2024
									Due After						Due After
			Due						One Year						Five Years						Due
			Within						Through						Through						After
Security Type			One Year						Five Years						Ten Years						Ten Years						Total
			(In thousands)
Fair Value:
Agency residential MBS			$	—					$	—					$	677					$	1,101,184					$	1,101,861
Agency commercial MBS			—						219,484						5,653						16,206						241,343
Agency residential CMOs			—						47,541						—						230,719						278,260
Municipal securities			—						16,445						16,612						—						33,057
Corporate debt securities			—						4,830						277,132						—						281,962
Private label residential CMOs			—						—						—						150,286						150,286
Collateralized loan obligations			—						—						109,354						—						109,354
Private label commercial MBS			—						—						1,132						16,944						18,076
Asset-backed securities			—						—						—						17,444						17,444
SBA securities			—						2,314						3,869						6,205						12,388
Total			$	—					$	290,614					$	414,429					$	1,538,988					$	2,244,031

Held-to-Maturity Investments Classified by Contractual Maturity Date

The following tables present the contractual maturities of our securities held-to-maturity portfolio based on amortized cost and fair value as of the date indicated:

			June 30, 2024
									Due After						Due After
			Due						One Year						Five Years						Due
			Within						Through						Through						After
Security Type			One Year						Five Years						Ten Years						Ten Years						Total
			(In thousands)
Amortized Cost:
Municipal securities			$	—					$	17,722					$	407,453					$	824,246					$	1,249,421
Agency commercial MBS			—						—						437,110						—						437,110
Private label commercial MBS			—						—						36,623						316,257						352,880
U.S. Treasury securities			—						—						188,495						—						188,495
Corporate debt securities			—						—						10,172						60,130						70,302
Total			$	—					$	17,722					$	1,079,853					$	1,200,633					$	2,298,208

			June 30, 2024
									Due After						Due After
			Due						One Year						Five Years						Due
			Within						Through						Through						After
Security Type			One Year						Five Years						Ten Years						Ten Years						Total
			(In thousands)
Fair Value:
Municipal securities			$	—					$	17,621					$	384,920					$	795,469					$	1,198,010
Agency commercial MBS			—						—						400,719						—						400,719
Private label commercial MBS			—						—						34,041						288,786						322,827
U.S. Treasury securities			—						—						171,929						—						171,929
Corporate debt securities			—						—						9,708						42,736						52,444
Total			$	—					$	17,621					$	1,001,317					$	1,126,991					$	2,145,929

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Available-for-sale Investments Classified by Contractual Maturity Date

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Tabular disclosure of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

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Tabular disclosure of credit quality indicator for investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

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Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-5

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-5

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-5B

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-5

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (aaa)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-5

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-5

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-5

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-5

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-5

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-5

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)(4)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-5

Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5A
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